Charles e



(No Model.)

0. E. BUOKBEE. PENDULUM ESOAPEMEN'I.

Patented June 5, 1894,

W/TNESSES:

A TTOHNE YS.

UNITED STATES PATENT EErcE.

CHARLES E. BUOKBEE, OF FLUSHING, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOHN K. CLARK, OF SAME PLACE.

PENDULUM-ESCAPEMENT.

SPECIFICATION forming part of Letters Patent No. 521 ,012, dated June 5, 1 894.

Application filed September 19, 189B. $erial N0. 4 4 (N model-l To 60% whom it may concern.-

Be it known that 1, CHARLES E. BUGKBEE, of Flushing, in the county of Genesee and State of Michigan, have invented a new and Improved ClockEscapement, of which the following is a full, clear, and exact description.

My invention relates to a clock escapement; and it has for its object to so construct the escapement that it will be much more economic, durable and simpler than escapements ordinarily employed in connection with clocks, and especially in connection with the pendulums of clocks.

Another feature of the invention is to so construct the escape wheel that it will have no recoil.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of a clock movement, illustrating the improved escapement applied, and the pendulum employed in connection with the escapement. Fig. 2 is an edge View of the improvement and of the escape wheel. Fig. 3 is a side elevation of the movement and escapement, illustrating, however, the pendulum in a different position than in Fig. 1. Fig. 4. is a side elevation of the escape wheel and pendulum applied thereto; and Fig. 5 is a transverse section through the escape wheel and pendulum rod, the section being taken practically on the line 55 of Fig. 4.

In carrying out the invention, the escape wheel A, is provided upon one of its faces with a series of embossed inclined planes 10, facing in the same direction and arranged at predetermined intervals apart diagonally upon the wheel; and the said inclined planes extend from a point near the center of the wheel practically to its periphery. Ordinarily the inclined planes are produced by attaching to or forming integral with the outer face of the wheel A a series of blocks 11, provided with smooth straight surfaces, except on one side, where the surfaces are decidedly inclined or beveled, producing the inclined planes above referred to. The wheel is mounted upon the escapement shaft 12 in the usual manner, and the said shaft is driven from a spring drum 13 through the medium of connecting gearing 14, such as is usually used in a clock movement.

The pendulum 15 is pivoted upon the casing of the clock movement at its upper end, and in the drawings it is shown as being guided in its movement by a strap 16, through which it passes, secured upon the lower portion of the movement casing. The pendulum is provided with a cross head 17, which cross head is attached at its center to the inner face of the pendulum rod 15. The cross head is so placed that it is immediately over the central portion of the escapement wheel, and

- will have movement between the blocks 11 of the wheel, or the inclined planes 10. The cross head 17, is provided with a friction roller 18 at each end, and the said friction rollers are adapted for engagement with, and to travel upon the inclined planes 10. Thus in operation, as the wheel A, is revolved, the inclined planes will engage alternately with opposite friction rollers 18, and impart to the pendulum its proper vibratory movement. The position of the pendulum at one end of its stroke is shown in Fig. 1, in which it will be observed that the right-hand friction roller is brought to an engagement with a righthand inclined plane, which, as the wheel revolves, serves to force the pendulum toward the left, through the medium of its cross head, and when at the end of this left-hand stroke, the left-hand friction roller will be in engagement with the left-hand inclined plane, as illustrated in Figs. 3, 4: and 5.

It is evident that an escapement so con structed is not only simple but that it will effectually operate the pendulum rod, and that there will be no recoil of the escapement.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a clock escapement, the combination, with an escapement wheel having a series of inclined planes formed upon one surface, ex= tending from a point near the center substantially to the periphery, the inclined planes being located at predetermined intervals apart, of a pendulum rod, a cross head secured upon the rod, and friction rollers located upon the ends of the cross head, adapted for alternate engagement with the inclined planes on the wheel, as specified.

2. In a clock escapement, the combination, with an escapement wheel, blocks secured upon one surface of the wheel and located at predetermined distances apart, the blocks being diagonally placed on the wheel and grouped around its center, corresponding surfaces of the blocks having inclined planes formed thereon, of a pendulum rod adapted 15 to cross the wheel, a cross head secured upon the rod, extending beyond opposite sides, and a friction roller located at each end of the cross head, the roller on the right being adapted to engage with inclined planes at the righthandside of the wheel and the roller on the left with the inclined planes at the left-hand side of the wheel, as and for the purpose specified.

CHARLES E. BUOKBEE. Witnesses:

C. A. CAMERON, 'H.'A. PRYOR. 

